Adjustment nut



FIG. 1 is a perspective view of the adjustment nut in accordance with the present invention;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right side view thereof, the left and right side views being identical; and,

FIG. 5 is a front view thereof, the front and rear views being identical.

The elements depicted in broken line in the various figures are included for environmental purposes only, and form no part of the claimed design. 

The ornamental design for an adjustment nut, as shown and described. 